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EMPLOYEE RELATED LIABILITIES (Schedule of Components of Net Periodic Benefit Cost Recognized in Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Postretirement Medicare Plan [Member] |  |  |
Net periodic benefit cost |  |  |
Service cost | $ 5 | $ 6 | $ 7
Interest cost | 52 | 57 | 72
Amortization of prior service costs | 0 | 0 | 0
Amortization of net loss (gain) | (179) | (241) | (298)
Total net periodic benefit cost | (122) | (178) | (219)
Other changes in plan assets and benefits obligations recognized in other comprehensive income: |  |  |
Prior service cost for the period | 0 | 0 | 0
Net loss (gain) for the period | (23) | 146 | (1)
Amortization of prior service costs | 0 | 0 | 0
Amortization of net gain (loss) | 179 | 241 | 298
Total recognized in other comprehensive income (loss) | 156 | 387 | 297
Total recognized in net periodic benefit cost and other comprehensive income (loss) | $ 34 | $ 209 | $ 78
Weighted average assumptions used: |  |  |
Discount rate | 2.80% | 3.40% | 4.50%
Expected return on plan assets |  |  |
Rate of comprehension increases |  |  |
Assumed health care cost trend rates: |  |  |
Measurement date | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Postretirement Medicare Plan [Member] | Pre-65 [Member] |  |  |
Assumed health care cost trend rates: |  |  |
Health care cost trend rate assumed for current year, medicare advantage | 6.00% | 6.20% | 6.90%
Health care cost trend rate assumed for current year, non-medicare advantage | 6.00% | 6.20% | 6.90%
Ultimate rate | 4.50% | 4.50% | 4.50%
Year the ultimate rate is reached | 2029 | 2029 | 2029
Postretirement Medicare Plan [Member] | Post-65 [Member] |  |  |
Assumed health care cost trend rates: |  |  |
Health care cost trend rate assumed for current year, medicare advantage | 6.50% | (5.00%) | 13.10%
Health care cost trend rate assumed for current year, non-medicare advantage | 6.50% | 6.10% | 7.90%
Ultimate rate | 4.50% | 4.50% | 4.50%
Year the ultimate rate is reached | 2029 | 2029 | 2029
Pension Plan [Member] |  |  |
Net periodic benefit cost |  |  |
Interest cost | $ 575 | $ 687 | $ 817
Expected return on the plan's assets | (788) | (909) | (930)
Expected Administrative Expenses | 100 | 100 | 100
Amortization of prior service costs | 3 | 3 | 3
Amortization of net loss (gain) | 27 | 27 | 0
Total net periodic benefit cost | (83) | (92) | (10)
Other changes in plan assets and benefits obligations recognized in other comprehensive income: |  |  |
Prior service cost for the period | 0 | 0 | 0
Net loss (gain) for the period | (1,038) | 149 | 1,158
Amortization of prior service costs | (3) | (3) | (3)
Amortization of net gain (loss) | (27) | (27) | 0
Total recognized in other comprehensive income (loss) | (1,068) | 119 | 1,155
Total recognized in net periodic benefit cost and other comprehensive income (loss) | $ (1,151) | $ 27 | $ 1,145
Weighted average assumptions used: |  |  |
Discount rate | 2.50% | 3.20% | 4.40%
Expected return on plan assets | 3.10% | 3.80% | 4.20%
Rate of comprehension increases |  |  |

X
- Definition The assumed health care cost trend rate for the current year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References No definition available. + Details
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